Sunday, September 23, 2012

Design plus program on the embedded circle MP3 apparatus - Technology

Summary: This word has released a system MP3 device style theory plus debugging technique upon this time frame associated with S3C4510B ARM7 processor plus VxWorks real-time operating system in detail, have looked through buildings as well as working function with network MP3 program put together by way of this sort of apparatus, have stated the item broadcasts this comprehensive practical application prospect on the area with open pronunciations like the super star hotel, long-distance bus, traveler train, pronunciation meeting,etc.. Keyword: ARM; MP3; S3C4510B; VxWorks; MAS3587F

It has for the most part called MPEG1 layer3 as well as MPEG2 layer3 this that community MP3 has summed upwards MP3, modern MPEG2.5 layer3 includes presented extremely effective folded coded method. Because MP3 has offered the particular speech data of high-fidelity, small computer code rate, can be widely used in different ingestion digital fields. Typical like: MP3 walkman, fresh vehicle carried audiofrequency apparatus,etc.. These apparatuses have high-capacity Flash memorizers (generally around preceding 32MB) And canonial offers the program outside, might download MP3 songs coming from computer system possibly Inetrnet in addition to store in addition to down lining in addition to broadcast here, might fulfill people as well as utilize your demand.

The circle MP3 gadget builds up system MP3 gadget along with application system that venture consists of and is particularly not the same as this regular personalized MP3 apparatus. It possesses Ethernet user interface and infrared remote-control interface of ordinary 100M, under the actual manage of real-time software, could obtain MP3 records pass from Ethernet, and doesn't want the following for you to retail store along with broadcast throughout real time. Under the cooperation associated with MP3 compiled value nick MAS3587F, can finish MP3 recording functionality broadcast and input that will MIC with MP3 pass marketing with the same time. MP3 program made by way of plurality of system MP3 apparatuses carries a community MP3 equipment (can become the particular embedded tool too) ,It can be used for stocking MP3 database plus handling overall technique as well as controlling. Index dependence on the function and the brand lectotype, matching into the demand connected with task requirement analysis studies and challenge order, that system MP3 gadget must satisfy this particular purpose plus directory requirement. Audio regularity rule as well as broadcasting function. Mainly include: Support to help encode MPEG1/2 layer3 which inputs the actual analog sound signal; Support MPEG1/2/2.5 layer3 for you to weaken your decoding of the bit stream; Support digital music mixing, digital audio size as well as stage good to regulate. Remote manipulate and broadcasting the boss function. Mainly include: Support that infrared review controller, insurance coverage conclude and also community MP3 device of report control take up RS-232 interface; Realize the manipulate on MP3 sound recording data stream under the actual manage connected with server; Play along with enter springing the function. Network function. Mainly include: On the actual schedule of supervisory command and data interchange of TCP/IP agreement; Automatic diagnose of that trouble, r eporting an unexpected emergency and also asking for help or perhaps enhanced caution for you to belief when using the apparatus; Automatic detection of the equipment and discerning; Support machines code; Support the IP address. Under that typical and also two bottle discipline of the cost, originally layout choice investigation connected with pick in addition to real-time software system. As for you to processor, must possess user interface or even extendible and corresponding software with 100MHz Ethernet interface, UART in addition to I2C. The traditional one-chip personal computer program obviously are unable to meet attribute along with real-time dynamics requirement, and take up more common microprocessor very the network control device method will probably certainly boost the gear cost, so ascertain to look at the particular network handler. Through surveying along with studying in a great many ways, elect two different circle handlers: Samsung ARM7 model S3C4510B as well as Motorola PowerPC processor MPC860T. The a couple possess 100M Ethernet MAC on-chip. Comparatively speaking, both the characteristic is going equal, nevertheless Samsung ARM7 processor chip S3C4510B has very considerable batch cost advantages. And because of the mass us going for ARM processor, home a lot of EDA creating instrument providers have available huge getting device remedy belonging to the cost performance, help make the advancement charge cut down drastically too, therefore this style and design judgement adopts S3C4510B ARM pick as the crucial processor. In real-time operating system, because of the real-time mother nature with this network MP3 apparatus is envisioned reasonably much, and the network facts tranny utilization in the single community MP3 gadget possesses increased impact on installed ability with the complete system, so, want to adopt the actual tricky real-time main system for the reason that application platform. Adopt VxWroks RTOS softwa re system because circle MP3 tool from the initial stage. The intersection of apparatus as well as intersection associated with layout principle along with according to ARM7 the particular intersection with system handler in addition to S3C4510B and tough the particular intersection connected with real-time working process and also the intersection involving tool plus the intersection connected with system structure along with stop diagram, MP3 of network, of VxWorks, MP3 of network, in the same way Fig. one particular Show. CPU is usually S3C4510B ARM7 microprocessor which the main frequency will be 50MHz, mostly surface finishes your supervisory command connected with Ethernet and also receiving and also dispatching with records flow. Send MP3 acustic info stream towards decoding the chips MAS3587F to be able to decode plus transmit and also control, obtain MP3 coded number, your data flow regarding radio stations under the particular manage involving methodical top operat ions server through MAS3587F. In addition, still recognize the actual review control and order in order to combine interpretive execution through RS-232 interface. MP3 compiled code, especially MP3 encodes (namely MP3 recording) Need substantial calculation sum, the standard approach is usually realized from the laptop software program and also customized DSP chip, because S3C4510B is often a circle handler during this project, that controlling capacity with it's digital signal can be a relative drained link, so includes recognized organizing the decoding function of MP3 by way of single chip MP3 created value chips MAS3587F. In addition, your network MP3 apparatus recollection adopts 16MB SDRAM HY57V281620 with a high speed, can be utilized intended for inside software execution, files space as well as buffers; The solidification memorizer from the system adopts 2MB Flash AM29LV160, the following memorizer is not merely memorable like: MAC address, non-volatile facts involv ing IP address, it can be utilised intended for prestoring some MP3 data. The infrared survey controlled adopts this infrared T-R television distributing from a number around the current market for you to design. Ethernet aspect has used the cost performance quite high RTL8201BL innovative PHY within the basis associated with ARM7 processor S3C4510B built-in 100MHz Ethernet MAC, can certainly the difference continues on 10M/100Mbps multi-level facts transmission. Under a great layout chassis, it can be with regards to 200 yuan which the important digital camera departmental price tag in the system MP3 tool on the sole sleeve can certainly possibly be controlled, can certainly meet your low-cost calls for connected with the majority of application. Apparatus, MP3 of network, develop, debug progress of apparatus, MP3 involving network, debug, are the intersection with components plus pattern of platform along with debug as well as real-time software program design and debug. T he computer hardware platform is accomplished schematic diagram and also PCB to style through PowerLogic as well as PowerPCB connected with PADS. After the hardware principle is assembled, employ Embest IDE to get ARM built-in advancement surroundings along with JTAG debugging system to help write the exam procedure, cooperate together with Tektronix a digital oscilloscope to place about the functional check that will every single portion of appliance design and style on the intention board. SDNS100 dependant on which Samsung gives you advances BSP rule crafting and test the fact that table VxWorks BSP template continues into the circle MP3 target board. In equipment design, still make the most of Foundation ISE built-in development environment involving Xilinx Company to create towards programmable logic gadget XC9572XLVQ64 within the board, surface your valid design and style connected with peripheral veneer with the processor. The progression associated with this real-tim e application method is generally completed by simply Tornado II regarding ARM included growth environment based about WindRiver Company. This bundled progress setting features a lot of codes along with task analysis tools for instance VxWorks real-time running system, ARM7 compiler, debugging device as well as WindView, can recognize this debugs goal aboard real-time software procedure quite a few types of modes, full-functions speedy through serial dock and Ethernet. After the actual system advancement of computer software is actually finished, make this intersection regarding Bootable VxWorks as well as the intersection with application plan graphic plus document into, solidify your map report around Flash through Embest IDE along with the intersection associated with JTAG as well as simulator, can break faraway from and debug the surroundings to control inside serious time.

The multi-level MP3 application system chassis network MP3 equipment might present play in order to utmost performance while having central hosts to regulate and command the program below exclusively inside one. The typical system MP3 application procedure chassis is usually demonstrated just as Fig. 2. The physique framework of the community MP3 application strategy is setup inside the multicasting network, within widespread condition, that system MP3 server directs chorus line as well as other thoughts messagings by way of technique of put out or perhaps multicasting. The network MP3 terminal installation might request obtain according to users' Request to help Send, machine respond to help request, established up, request the passway though being one-to-one quickly ask. Any system MP3 terminal setting up (users) Can set off MP3 in addition to ask for request. The types which can often be build request that passway variety along with depend on network bandwidth and syste m hesitate (under 100M Ethernet condition, the actual system nearly uses 30% network bandwidth resource whilst coping with a pair of in addition to seeking the passway) . When there are crucial notices as well as voice messagingsing, can certainly developed and also insert the passway, the priority on this passway is more than just about any broadcast, multicasting or obtain the concern with the passway, the idea is a unconditional playmode, the exceptional intent connected with reporting an urgent situation as well as applying for help or elevated vigilance etc. associated with it is usually applied pertaining to broadcasting the important recognize or accidenting. In addition, every single multi-level MP3 is definitely terminal could also kick-off paging. Namely radio, multicasting or even unicast that will other network MP3 airport terminal stations after the system MP3 airport terminal installation encodes MP3 to MIC enter signal, this particular function may be used ins ide the getting together with talk from the pronunciation or even pronunciation classroom system. Under the above-mentioned community MP3 program method chassis architecture, mainly there are these types of two logic avenues around that network MP3 network: Control bus (CBUS) And files bus (DBUS) . The control bus mainly transmits different software plus handle command, women and men records bus largely transfers the sound recording rate MP3 data flow. The typical circle MP3 employs this procedure software package chassis to be proven as with Fig. 3.

The multi-level MP3 step-by-step job application potential network MP3 method could end up being put on your music system associated with wedding guest bedroom from the super star lodge extensively, criminal court pronunciations including the long-distance bus, passenger train, pronunciation achieving along with pronunciation classroom,etc. over the air the application. The common practical application just like the music system with client room of movie star hotel, that is a alternative of your sort of Full Digitalization, the functional Off-The-Shelf LAN details interface associated with star hotel, are finished with could finish off the installation of towards the recent circuit any kind of transformation. By technique of sharing MP3 music storehouse, give and also enjoy it company as well as provide the actual various, high-quality new music for you to enjoy. This gadget also has pronunciation asking, notifying along with sudden problem (such while the particular fire) associated with guest place on the place assistance in the same time Evacuate added functions for example radio,etc. promptly. On long-distance buses as well as voyager trains, delivers this passenger MP3 music to orient that request company is a style with brand-new support written content which is actually vibrant inside the prospect. In addition, for the reason that function that this multi-level MP3 encodes real-time MP3 involving your presentation signal, and, them is actually small, low cost, stability are high, provide the multi-level as well as insert a whole lot of benefits such as the function, have got popular strengths above the standard computer software program code or even personal computer plug-in card MP3 recording way, so, this specific tool can even be utilized by the special MP3 documenting job application inside process with broadcasting and TV.

After the multi-level MP3 tool associated with concluding the speech evolves and finishes, collect that favorable comment the fact that actual challenge offers applied plus attained users using hotel room visitor area stereo system at first. What most people developed, vehicle carried host associated with embedded multilevel MP3 process ideal for that long-distance bus slipped this task in to as well as utilised meanwhile. Believe by using that frequent offers in the community MP3 equipment as well as manufactured program of system, the system MP3 is used throughout increasingly quite a few utilization field, as well as confident economic advantages and also public profit will emerge.